Changes of State
When can sublimation occur?
Sublimation occurs in solids with vapor pressures that exceed atmospheric pressure at or near room temperature.
The change of a substance from a solid to a vapor without passing through the liquid state is called sublimation. Sublimation can occur because solids, like liquids, have a vapor pressure.
The change of a substance from a solid to a vapor without passing through the liquid state is called sublimation. Sublimation can occur because solids, like liquids, have a vapor pressure.
How are the conditions at which phases are in equilibrium represented on a phase diagram?
The conditions of pressure and temperature at which two phases exist in equilibrium are indicated on a phase diagram by a line separating the phases.
phase diagram
a graph showing the conditions at which a substance exists as a solid, liquid, or vapor
Triple Point
the point on a phase diagram that represents the only set of conditions at which all three phases exist in equilibrium with one another
sublimation
the process in which a solid changes to a gas or vapor without passing through the liquid state